Henry mathey



UNITED STATES HEXRY MATHEY, OF I\'E\V YORK, N.

ova/a9 PATENT OFFICE.

Y., ASSIGNOR TO JOSE F. NAVARRO,

OF SAME PLACE.

MANUFACTURE OF HYDRAULIC CEMENT.

SPECIFICATION forming part of Letters Patent No. 343,184,6ated June 8,1886,

Application filed March '27. 1856. Serial No. 196,843.

tNo specimens.)

York, in the county of New York, State of 5 New York, have invented certain new and useful Improvements in the Manufacture of Hydraulic Cement, of which the following is a specification.

My invention relates to the manufacture of cement from ar illaceouslimestone. Heretofore in the swim one 1n revolv- No. 325,259 of September 1, 1885. Next, I take a metallic oresuch as iron oreand r0, st itin a reverberatory furnace ior other suitable apparatus) for the transformation of the iron into an oxide, as set forth in an application filed of even date with this. This is allowed to cool gradually, and protected from the air during the cooling process. This oxide is then added to the mixture of clay and stone as above mentioned, and these elements stone, clay, and oxide of iron-are all "round ing kilns-such as granted me in Letters Pat to' etl The elements are thus tho1"oughl out No. 325,259, September 1, 1885, and No? 11113161 iogether.

339,673, April 13, lSS6it has been found that by reason of deficiency in alumina and iron the resultant cement was of an inferior quality. Again, when such stone is burned with no excess of oxygen, the cement is naturally oflight color. I find, also, that the addition of alumina and iron in the form of clay to the stone yields a better stone than w ien 1e natfi'mlrock alone is used. Therefore, in the process now to be described, I will burn the stone, properly mixed with clay, wmn jnislled 25 amount of oxygen or wit-h just enough oxygen top'roniote combustion; second, after burning I will add a metallic oxide. se iaratel burned to the stone an( e ay; third, iina these materials together.

I first take the nat-urgl-cenggfiut gk and crush it to a suita e cgree o ueness. To

this I add crushed cl before burning. I

then feed this materia 111.0 agtevolving furi nace, such as granted to me inEjtters a en The proportions of clay and oxide of iron may be variedas circumstances require.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The process of manufacturing cement, which consists in first crushing the natural-cement stone to a suitable degree of fineness, then thoroughly mixing crushed clay with the stone and burning these elements together in astate of agitation and dissemination, next adding, after burning, a pulverized metallic ore roasted separately to form an oxide, and finally pniverizing the stone, clay, and oxide to gether.

In testimony whereof I afiix my signature in presence of two witnesses.

HENRY MATHEY.

\Vitnesses:

J OHN T. Arms,

W. C. ALVORD. 

